ఒకవేళ \(\rm \sec A=\frac{17}{15}\) అయితే, అప్పుడు cot A విలువ ఎంత? 

1
\(\frac{15}{21}\)
2
\(\frac{15}{7}\)
3
\(\frac{8}{15}\)
4
\(\frac{15}{8}\)

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